JJX-3019 Borehole Deviation & Natural Gamma Probe

PRODUCT PARAMETERS

The structural design of the downhole instrument has been optimized, making the operation extremely simple, and the seismic performance of the instrument has been greatly improved, making it more durable.
It integrates the functions of inclination measurement and natural gamma measurement, saving logging work time.

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Description

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Description

JJX-3019 Borehole Deviation & Natural Gamma Probe

Abstract

JJX-3019 Borehole Deviation & Natural Gamma Probe is a digital logging tool that integrates natural gamma measurement and deviation measurement. The data measured downhole can be displayed in real time on the computer in the current measurement curve and chart. It also improves the natural gamma point measurement method that has been used to be continuous logging, which not only has high data collection efficiency, but also reduces the impact of human factors on the measurement data. It also has a large amount of information and high confidence, and will not miss abnormal sections.

Applicable Conditions

● Cased

● Bare hole fill with water or mud

● Bare Dry hole

Applications

● Coal, gas, nuclear, hydrology and other drilling guidance or drilling quality detection.

● Pile foundation engineering detection for water conservancy and hydropower, highway bridges, large buildings, etc.

● Estimation of uranium concentration.

● Dividing the stratum interface and judging the changes in the stratum phase.

Features

● The structural design of the downhole instrument has been optimized, making the operation extremely simple, and the seismic performance of the instrument has been greatly improved, making it more durable.

● It integrates the functions of inclination measurement and natural gamma measurement, saving logging work time.

Specifications

Vertex angle measurement range	0°~50°, Measurement accuracy: ±0.1°; Resolution: 0.01°
Azimuth measurement range	0°~360° ,Measurement accuracy: ±2° (vertex angle 1°~15°)
Natural gamma measurement index	See the instruction manual of FD-3019 scintillation gamma logging tool
Measurement method	A) Point measurement according to depth; B) Continuous measurement according to depth
Signal output	Bipolar encoding

FAQ

In gravity exploration (SI), what is the unit of gravity? How to convert gravity units between SI and CGS?

What are gravitational field and gravitational potential?

What is the normal gravity field of the earth? What are the rules for the change of the normal gravity field with latitude and altitude?

① The normal gravity field of the earth: Assuming that the earth is a rotating ellipsoid (reference plane), the surface is glossy, the internal density is uniform, or it is distributed in concentric layers, the density of each layer is uniform, and the deviation of the shape of the ellipsoid from the geoid is very small, then the gravity field generated by the earth is the normal gravity field.
② The normal gravity value is only related to the latitude, the smallest at the equator and the largest at the poles, with a difference of about 50,000 g.u.; the rate of change of the normal gravity value with latitude is the largest at 45° latitude, and zero at the equator and the poles; the normal gravity value decreases with increasing altitude, and its rate of change is -3.086 g.u.. The main feature of the long-term change is the "westward drift" of the geomagnetic elements, both the dipole field and the non-dipole field drift westward, and have a global nature.

What is the relationship between gravitational field strength and gravitational acceleration?

What is gravity exploration?